Diamond and the like cutting tool



July 27, 1 943.

E. L. MEESON DIAMOND AND THE LIKE CUTTING TOOL Filed July 1, 1942 ,2 Sheets-Sheet l BMW 5 \17 Ir'we nt or:

Edwix I.. liceson v by wmim s.

July 27, 1943.

E. 1.. ME ESON DIAMOND AND THE LIKE CUTTING TOOL Filed Jul 1, 1942 F915 .ig'ia. E 113 2 Sheets-Sheet 2 Patented July 27, 1943 OFFICE nmMoNnANn THE LIKE oo'rrmo moor. Edwin paur ence Meeson, Coventrv, England Application July 1, 1942, s-enerNe4ra2sr "In Grca'tBriiain December Hi; 1941 x This invention relates to diamondand the like putting toolsys-uch as are employed'for dressing grinding and'abrading wheels, and more parti'cuiarly to the kind in which the "tool proper, consisting of a mount on slug carrying one or more diamonds-or the like cut-ting elements, is "mounted so that when presented to a rotating grinding wheel it will give a trailing cut in either direction of traverse across the wheel surface and will be automatically rocked from one position to the other "between successive traverses, by the actionpf the travers-ingmotionir The object of the present invention is to pro"-' vide amounting of this kind in which the position of the tool can be reversed atany point in its traverse in either direction without any risk of damage to the wheel or to'the tool.

According to the present invention a diamond tool of the kind herein referred to is characterized in-that during the rocking movement'of the tool from one trailing position to the oth'enlth e "point of the diamond describes a straight-line path parallel or substantially parallel with the surface of the grinding wheel so thatif the trailing position of the tool is reversed atan poi-nt" in its traverse in either" direction-no undue stresses are set up in the tool and there will be little or no tendency for the point of the diamond "to dig intoandldamage the surface of the grindi ng wheel. H p I a This very desirable resultf is obtained *by providing for the slug or mount carrying the diainond to have a combined pivotal and axial movement, the former being produced by'the traversing movement and limited by suitable stops, and

the latter controlled by means or a cam surface 'with or without'the assistance of spring pressure;

' "In the accompanying d'rawim gs,v f l V Figure 1 is a planview'of one-construction of diamond tool embodyingthe present invention.

1 Figure 2 is a side viewthereof. p p

Figure 3 is a plan view or the housing: Figure 4 is a sideview thereof. t Figure 5 is a front viewlthereof.

Figure 6 is ;a plan view'of theicylindricalmemt :I

" Figure 7 is aside view. thereof.

I Figure 8 is la vdetail view of the top plate; m

Figure 9;is a plan view of an alternative construction of diamond tool; embodying thepresent invention. a v r Figured-0isasideviewthereof.- r. Figure l'l isia pianviewaof the h'ousing. r y Figurezlzis'asidelviewtand M w In 'theconstruotion shown in Figures 1-8, the

slug or' 'mount '2 carrying the diamond 3 isiixed in a member 4 offpart cylindrical form, see Fig-- ures 6 and 7; which is mounted so as to be free to turn about its geometrical axis in ehorizontal plane and tohave a limited movement in ea/ch direction "at right angles to said axis; in a housing 5,- see Figures 3, 4 and 5, the interior coniigr-iration 'ofwhich is'such as "to provide substantial bearing surfaces Safer said member in each position it may occupy therein along a line at right anglesto sai'daxis. For this purpose the said surface 'c'olnprises two part-circular arcs joined together by flat portions '5 of a length equal to thereq-iiired movement of said member at right' angles to its axis. The housing is open at the frontand at the "top hut is normally closed to exclude grit removed by the tool from the grinding wheel, by means of a plate 3, Figure 8, located on the upper face of the housing by means 50f pins 5, and by a front plate 8 which to elosetheropening-fi housing and top plate, and is formedwitha slot 8- through which the front end of the slug 2 protrudesL The-rear wall ofthe housingris formed interiorly: with a concave cam surface 1 I of elliptical form against which a rounded projec- 'tion or nose et the rear of the-said member 4 makes constant contact; The top plate, see Fig- "g'ur e 8, is provided'with an opening '6 to give ac- CeSSi-t0 a set screw which secures the slug 21in the member 4, and to enable lubricantto he supplied via. the duct :6 to the cam surface. A swinging plate "IxPiVQllEd at -one end to thetop plate and having an "open-'iended slot Ta 4 in the other for engagement with a pin 6?, is provided The formation of the cam surface i such that a the saidimember 4 turns aboutits-axisin the housing 5, when the directioniof'traversenfthe tool is changed, it allows the said member to 'move in adirection-atrightangles to the axis of the latter to sueh -a varyi gextent thaitthe point imaylce, the diamond or the like of the diamond, during the change over from the one trailing position to the other, describes av straight line path parallel with the surface of the grinding wheel 12.

The housing itself is angularly adjustable about a horizontal axis on trunnions [3 which are supported in open vertical slots M in the limbs-of a yoke or fork M. The yoke is provided with a stem or shank l5 for attachment to a slide orcarriag'e (not shown) by means of which the tool is traversed across the face of the grinding wheel.

The trailing angle of the tool in each direction of traverse is determined by shoulders [6 on the member 4 co-operating with stops IT on the housing 5.

, in said member, a mount fixed in said sleeve and The annular position of the -housing: about 1 t the axis of the trunnions is locked by means-of nuts [8 screwing onto the ends of the latter and the housing is positively prevented from turning in-one direction against theaction of the grinding wheel on the tool by means oi a screw; 19 carriedby a split lug 20 on the housingand adapted to bea against an-abutment 2 l .onthe yoke M. A fine adjustment for-the housing in one direction about the axis or the trunnions can be obtained by-adjusting the said screw in its lug. Thescrew itself can be locked in itsadjusted position by clamping the split lug about it by means of a'bolt or-screw passingthrough the split ends of the lug. 7 g j In the alternative construction shown in Figures 949 which also gives a straight line motion for theidiamond. point, the slug or mount 2 instead of being rigidly fixed in fthe part cylindr cal membe ,4 is fixedin asleeve 22 having alongitudinal oraxial forezandaft, sliding movement in the member 4. In this case the said memberhas an oscillating movementin bearings 5 in the housing 5 about a fixed centre and the axial movement ;of the sleevecarrying the slug is controlled by a conea-ve cam surface H formed in a plate 23, Figures 18 and-l9, at the back of the housing, against rwhichsurfacega projection 24 carried by the inne end. of the sleeve is held by means of a spring -25v introduced between, top and bottom flange portions 26' on the inne-r'end of the sleeve and the :reariace of the member 4'. The trailing angle of the tool for each direction of traverse is jdetermined by contact: between the :peripheral edges of the fiange portions 26 and vertical faceszl at each side. of the housing. The said flange. portions are also formed with flats 28, see Figures 16 and -17, so that when the top plate 6-is assembled in position to close the-upper side of the-housing-i, the sleeve is "prevented from rotation. Otherwise the constructionis similar to that above-described with reference to Figures 18,the housing 5 beingprovided with trunnions 1-3 pivotally and locking in a manner similar. :tothat above described.

both directions of traverse with .a trailing cut 'so that by repeated zangular adjustment of the slug or mount about its own'axis. in'the aforesaid member 4, or inthe sleeve'22, as the case cutting element develops-a conicalpoint. 1

" Iclaim:

1. A. tool of the,;character;described compris- ;;ingl a A holder adapted for? reciprocation across 'mounted in slots M inthe jawsof the yokewof the holder and arranged for -angularsadjustment carrying at least one cutting element, and cooperating surfaces on said member and sleeve for controlling and limiting their respective movements.

3. A tool of the character described comprising aholder, a housing pivotally mounted therein and having internal part spherical seatings connected by a parallel portion, and a cam surface,

.a part spherical member free to turn and to -a sleeve slidably mounted insaid member and having a projection co-operating with the cam surface of said housing, a spring for maintaining said co-operatingpartsin contact with each other, and a mount fixed in said sleeve and carrying at leastonecutting element.

5. In a tool for dressing grinding wheels -wherein a diamond mounting is free to rock from one trailing position to the other as the tool is traversed across the .face of the grinding wheel; a holder, a member adapted to receive said diamond mounting and capableof simultaneous oscillating and sliding'movements relatively to said holder, and means for controlling the movements of said member so that during 'the rocking motion of'said mounting the point of the diamond describes a straight line path parallel with the face oi the grinding wheel.

6, In a tool for dressing grindihg wheels wherein a diamond'mounting is free to rock from one trailing position to the other as thetool is "traversed across the race of the grinding wheel;

a holder, a member capableoi anoscillating movement therein, a sleeve slidablyfmo'unted in said member andcarrying said diamond mounting, and co-operating partsonsaidlholder and sleeve whereby during the rocking motion of said mounting the point of the diamond iscaused to describe a straight line path.

7. In a" tool. forv dressing grinding wheels wherein a diamond mounting is free to'f rock from one'trailing position'tothe other as the tool is traversed across the face of the' 'grinding wheel; a holdena member adapted to receive said diamond mou'ntingjsaid member being free to oscillate in said holder and to have asimuI- taneous sliding movement relatively theret0,-a'nd co-operating surfaces on saidholder and member whereby the'point oi'the diamond is caused to describe a straight line path dur'ing thfIOCki8. In a tool for dressing grindingwheels .wherein a diamond mounting is free to rock from (one trailing positionto.5the'other as the tool is traversed across the'vface ofith'e. grinding wheel; a holder, a block angularly adjustable therein, a spherical member free to oscillate in said block, a sleeve carrying said diamond mounting and free to slide in said member, and,

means for controlling the sliding movement of said sleeve so that during the oscillation of said member the point of the diamond describes a straight line path parallel with the face of the grinding wheel.

9. In a tool for dressing grinding wheels wherein a diamond mounting is free to rock from one trailing position to the other as the tool is traversed across the face of the grinding wheel; a holder, at block angularly adjustable therein, a member carrying said diamond mounting and free to oscillate in said block, and cooperating surfaces on said block and member adapted as the tool is traversed across the face of the grinding wheel to cause the point of the diamond to describe a straight line path paral- 10 lei with the surface of the grinding wheel.

EDWIN LAURENCE MEESON. 

